CN101718608B - Electromagnetic valve leak detection system for blood purification - Google Patents
Electromagnetic valve leak detection system for blood purification Download PDFInfo
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- CN101718608B CN101718608B CN2009101913232A CN200910191323A CN101718608B CN 101718608 B CN101718608 B CN 101718608B CN 2009101913232 A CN2009101913232 A CN 2009101913232A CN 200910191323 A CN200910191323 A CN 200910191323A CN 101718608 B CN101718608 B CN 101718608B
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 239000008280 blood Substances 0.000 title claims abstract description 23
- 210000004369 blood Anatomy 0.000 title claims abstract description 23
- 238000000746 purification Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 20
- 230000003534 oscillatory effect Effects 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 8
- 230000004087 circulation Effects 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/184—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for valves
Abstract
The invention discloses an electromagnetic valve leak detection system for blood purification, comprising a liquid circuit and a detection circuit, wherein the liquid circuit is provided an electromagnetic valve and a liquid circuit pipeline. The system is characterized in that the detection circuit is provided with a signal generation circuit, a signal acquisition circuit, a signal processing circuit, a first detection electrode and a second detection electrode. The system has the beneficial effects of high reliability, simple structure and convenient installation, can perform real-time online detection on the electromagnetic valve in blood purification equipment in the whole operation process, achieves discrimination in that whether leakage is generated or not by continuously detecting the liquid flowing condition of an inlet end and an outlet end of the electromagnetic valve, and accurately identifies whether connection and disconnection of the electromagnetic is reliable or not. Therefore, the system can completely avoid safety risk caused by electromagnetic valve leakage, and has obvious advantage of no leakage alarm.
Description
Technical field
The invention belongs to a kind of blood purification pick-up unit, the electromagnetic valve leak detection system for blood purification in a kind of specifically blood purification liquid road.
Background technology
In blood cleaning equipment, patient's blood flows out in the body to purify through blood purification system to be got back in the body, comprises bloody path, liquid road and three parts of supervisory system in blood cleaning equipment.The bloody path system is with outside the blood lead body in patient's body, enters blood cleaning equipment, flows back in patient's body again; Liquid-way system is to reach therapeutic purposes by solution disperse and ultrafiltration between blood and the dislysate; Supervisory system is to monitor by each parameter of blood cleaning equipment.
For keeping acid base equilibrium, curative effect and safety, the preparation of dislysate, flow velocity, turnover balance, and the sterilization on liquid road, cleaning have adopted some monitorings such as solenoid valve, liquid pump, sensor, execution unit to implement to cooperate control to constitute the supervisory circuit system.
Solenoid valve by the switching to different solenoid valves, is communicated with the different work loop of formation with piping system as the open and close execution unit in the circulation system of liquid road in equipment running process.This each work is changed in the road, and solenoid valve should bear the pressure differential between different circuit, also will open and close by the step preface under the driving of controller, reaches treatment and purpose of safe operation.Therefore, solenoid valve switches reliability, and particularly under acid and alkali corrosion and frequent switching condition, the monitoring that whether produces leakage is even more important, and is directly maintaining the life security of patient in therapeutic process.
The electromagnetic valve device of existing blood cleaning equipment, generally adopt dual mode that leakage situation is detected judgement:
A kind of is to detect size of current in the electronic switch loop of electromagnetic valve coil power supply, judges whether solenoid valve produces under the situation of needs closure that coil opens circuit and short circuit;
Its shortcoming is: this method, in fact can only judge electromagnetic valve coil or driving circuit fault, and can't detect the truth that valve body leaks.
Second kind of scheme is that the pressure by the tracer liquid flow cycle keeps situation, whether the indirect review leakage takes place, its method is when treatment intermittence or equipment self-inspection, close the solenoid valve on certain section liquid road, adopt the liquid pump that this section pipeline is suppressed to certain pressure limit, by the pressure transducer detected pressures situation of change in this loop, if can in the certain hour scope, keep-up pressure in less fluctuation range, then judge not have leak take place, otherwise then think and exist solenoid valve to leak.
Its shortcoming is: this method can detect most leakage situation, but can't detect the tiny leakage of slow generation or the accidental leakage in the operate as normal in application in practice, causes treating potential safety hazard easily.
Summary of the invention
The objective of the invention is: a kind of electromagnetic valve leak detection system for blood purification is provided, can carry out real-time online in the whole service process to the solenoid valve in the blood cleaning equipment detects, accurately whether the break-make of identification solenoid valve is reliable, thereby can avoid fully leaking the security risk that causes because of solenoid valve, have the reliability height, do not have the remarkable advantage of failing to report.
For achieving the above object, the invention provides a kind of electromagnetic valve leak detection system for blood purification, comprise liquid road and testing circuit, wherein the liquid road is provided with solenoid valve and influidic pipe road, its key is: described testing circuit is provided with signal generating circuit, the output terminal of this signal generating circuit connects first detecting electrode, this first detecting electrode is installed in the influidic pipe road of described solenoid valve one side, in the influidic pipe road of this solenoid valve opposite side second detecting electrode is installed, this second detecting electrode connects the input end of signal acquisition circuit, the output terminal of this signal acquisition circuit is connected with signal processing circuit, and this signal processing circuit generates the signal whether solenoid valve leaks.
When solenoid valve produces leakage or opens, between first electrode and second electrode liquid communication is arranged, the alternating-current pulse signal that signal generating circuit produces checks that from first electrode sends, this signal passes through the conductive characteristic of liquid and is transferred to second detecting electrode, by flowing liquid as media, the first inspection electrode that second detecting electrode will receive sends signal and is sent to signal acquisition circuit, after signal acquisition circuit detects pulse signal and amplification, further be transferred to signal processing circuit, signal processing circuit is exported the solenoid valve leakage signal at last;
If closed electromagnetic valve and when produce leaking does not have the conducting liquid circulation between first electrode and second electrode, its impedance convergence infinity can't constitute the pulse signal transmission channel, and signal processing circuit is exported the leak free signal of solenoid valve at last.
Described signal generating circuit is an oscillatory circuit, this oscillatory circuit is provided with operational amplifier, the inverting input of this operational amplifier is connected in series ground connection behind first electric capacity, the normal phase input end of this operational amplifier is connected in series ground connection behind first resistance, be serially connected with first feedback resistance between the output terminal of this operational amplifier and the inverting input, also be serially connected with second feedback resistance between the output terminal of this operational amplifier and the normal phase input end, the output terminal of this operational amplifier links to each other with the positive pole of first zener diode after being connected in series first current-limiting resistance, the negative pole of this first zener diode connects the negative pole of second zener diode, the plus earth of this second zener diode, the positive pole of described first zener diode also is connected on the normal phase input end of emitter follower, the inverting input of this emitter follower directly links to each other with output terminal, and the output terminal of this emitter follower is connected on described first detecting electrode.
This signal generating circuit is the oscillatory circuit of a fixed frequency, output bipolarity square-wave signal, and its output terminal is connected to first by lead-in wire and checks on the electrode.
Described signal acquisition circuit is provided with an in-phase amplifier, the normal phase input end of this in-phase amplifier is connected with second detecting electrode after being connected in series second current-limiting resistance, ground connection behind inverting input string first divider resistance of this in-phase amplifier, be connected with feedback resistance between the inverting input of this in-phase amplifier and the output terminal, this output terminal is the signal output interface of described signal acquisition circuit.
The input end of this signal acquisition circuit is connected on second detecting electrode, is used for the pulse signal amplification that will collect and is sent to described signal processing circuit.
Described signal processing circuit is provided with an envelope detection circuit, this envelope detection circuit is provided with the 3rd zener diode, the positive pole of the 3rd voltage stabilizing diode receives the output signal of described signal acquisition circuit, the negative pole of the 3rd zener diode is connected on the normal phase input end of voltage comparator after being connected in series second resistance, ground connection behind the normal phase input end serial connection pull down resistor of this voltage comparator, the two ends of this pull down resistor also and be connected to second electric capacity, the inverting input of described voltage comparator is connected with positive supply after being connected in series second divider resistance, the inverting input of this voltage comparator links to each other with ground after also being connected in series a slide rheostat, and the output terminal of this voltage comparator is exported the signal whether described solenoid valve leaks.
The input end of this signal processing circuit is connected with the output terminal of described signal acquisition circuit, through detection and shaping, exports the signal whether solenoid valve leaks at last.
Remarkable result of the present invention is: a kind of reliability height is provided, simple in structure, electromagnetic valve leak detection system for blood purification easy for installation, can carry out real-time online in the whole service process to the solenoid valve in the blood cleaning equipment detects, by import of continuous detection solenoid valve and endpiece liquid flow situation, reach and whether produce distinguishing of leakage, accurately whether the break-make of identification solenoid valve is reliable, thereby can avoid fully having and not having the remarkable advantage of failing to report because of solenoid valve leaks the security risk that causes.
Description of drawings
Fig. 1 is a control principle block diagram of the present invention;
Fig. 2 is a testing circuit schematic diagram among the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
As shown in Figure 1, a kind of electromagnetic valve leak detection system for blood purification, be provided with liquid road and testing circuit, wherein the liquid road is provided with solenoid valve and influidic pipe road, described testing circuit is provided with signal generating circuit 3, the output terminal of this signal generating circuit 3 connects first detecting electrode 1, this first detecting electrode 1 is installed in the influidic pipe road of described solenoid valve one side, second detecting electrode 2 is installed in the influidic pipe road of this solenoid valve opposite side, this second detecting electrode 2 connects the input end of signal acquisition circuit 4, the output terminal of this signal acquisition circuit 4 is connected with signal processing circuit 5, and this signal processing circuit 5 generates the signal Vo whether solenoid valve leaks.
When solenoid valve produces leakage or opens, between first electrode 1 and second electrode 2 liquid communication is arranged, the alternating-current pulse signal that signal generating circuit 3 produces checks that from first electrode 1 sends, this signal passes through the conductive characteristic of liquid and is transferred to second detecting electrode 2, second detecting electrode 2 is sent to signal acquisition circuit 4 with the signal that receives, after signal acquisition circuit 4 detects pulse signal and amplification, further be transferred to signal processing circuit 6, signal processing circuit 6 last output low level signal Vo are the solenoid valve leakage signal;
If closed electromagnetic valve and when produce leaking, there is not the conducting liquid circulation between first electrode 1 and second electrode 2, its impedance convergence infinity can't constitute the pulse signal transmission channel, and signal processing circuit 6 last output high level signal Vo are the leak free signal of solenoid valve.
As shown in Figure 2, described signal generating circuit 3 is an oscillatory circuit, this oscillatory circuit is provided with operational amplifier IC1A, the inverting input of this operational amplifier IC1A is connected in series first capacitor C, 1 back ground connection, the normal phase input end of this operational amplifier IC1A is connected in series first resistance R, 3 back ground connection, be serially connected with the first feedback resistance R1 between the output terminal of this operational amplifier IC1A and the inverting input, also be serially connected with the second feedback resistance R2 between the output terminal of this operational amplifier IC1A and the normal phase input end, the output terminal of this operational amplifier IC1A links to each other with the positive pole of the first zener diode D1 after being connected in series the first current-limiting resistance R10, the negative pole of this first zener diode D1 connects the negative pole of the second zener diode D2, the plus earth of this second zener diode D2, the positive pole of the described first zener diode D1 also is connected on the normal phase input end of emitter follower IC1B, the inverting input of this emitter follower IC1B directly links to each other with output terminal, and the output terminal of this emitter follower IC1B is connected on described first detecting electrode 1.
This signal generating circuit is an oscillatory circuit that frequency is 1KHz, output bipolarity square-wave signal, and its output terminal is connected to first by lead-in wire and checks on the electrode 1.Described operational amplifier IC1A adopts general integrated operational amplifier LM324, power by one group ± 5V power supply, wherein operational amplifier IC1A, first capacitor C 1, the first feedback resistance R1, the second feedback resistance R2 and first resistance R 3 are formed bipolar pulse generation circuit, the first zener diode D1 and second zener diode D2 serial connection are a slicer, and emitter follower IC1B plays buffer action to the bipolarity square-wave signal that produces.
Described signal acquisition circuit 4 is provided with an in-phase amplifier IC1C, the normal phase input end of this in-phase amplifier IC1C is connected with second detecting electrode 2 after being connected in series the second current-limiting resistance R4, ground connection behind the inverting input string first divider resistance R5 of this in-phase amplifier IC1C, be connected with feedback resistance R6 between the inverting input of this in-phase amplifier IC1C and the output terminal, this output terminal is the signal output interface of described signal acquisition circuit 4.
The input end of this signal acquisition circuit 4 is connected on second detecting electrode 2, is used for the pulse signal amplification that will collect and is sent to described signal processing circuit 6.
Described signal processing circuit 6 is provided with an envelope detection circuit, this envelope detection circuit is provided with the 3rd zener diode D3, the positive pole of the 3rd voltage stabilizing diode D3 receives the output signal of described signal acquisition circuit 4, the negative pole of the 3rd zener diode D3 is connected on the normal phase input end of voltage comparator ic 1D after being connected in series second resistance R 7, ground connection behind the normal phase input end serial connection pull down resistor R11 of this voltage comparator ic 1D, the two ends of this pull down resistor R11 also and be connected to second capacitor C 2, the inverting input of described voltage comparator ic 1D is connected with positive supply after being connected in series the second divider resistance R8, the inverting input of this voltage comparator ic 1D links to each other with ground after also being connected in series a slide rheostat R9, and the output terminal of this voltage comparator ic 1D is exported the signal Vo whether described solenoid valve leaks.
The input end of this signal processing circuit 6 is connected with the output terminal of described signal acquisition circuit 4, the envelope detection circuit that described switching diode D3, second resistance R 7 and second capacitor C 2 are formed takes out the voltage Vx of reaction detection signal amplitude, take out reference comparison voltages Vr by the second divider resistance R8 and slide rheostat R9 dividing potential drop, wherein the voltage Vx of signal amplitude sends into the in-phase input end of voltage comparator ic 1D, reference comparison voltages Vr sends into the inverting input of voltage comparator ic 1D
If closed electromagnetic valve and generation leakage, then there is not liquid communication between first detecting electrode 1 and second detecting electrode 2, it is infinitely great that its impedance is tending towards, can't constitute signal path, signal acquisition circuit 4 does not have the useful signal input, thereby make envelope detection circuit output Vx level off to 0, then comparer IC1D output end vo is a high level;
If solenoid valve produces when leaking or opening, the conducting liquid circulation is then arranged between first detecting electrode 1 and second detecting electrode 2, its impedance phase is to less, form signal path, amplify by 2 samplings of second detecting electrode and by in-phase amplifier IC1C, the pulse signal of output obtains amplitude voltage Vx through after the envelope detection again, this amplitude voltage Vx compares at input end and the reference comparison voltages Vr of voltage comparator ic 1D, when amplitude voltage Vx is higher than reference comparison voltages Vr, output Vo is a low level, thereby takes out the status signal that solenoid valve is opened or leaked.If system detects output voltage V o under the condition of solenoid closure is low level, can judge that then solenoid valve leaks, thereby take the emergency disposal measure rapidly, avoid equipment and treatment harm.
Described slide rheostat R9 is used to be provided with the reference voltage Vr of comparer, thereby adjusts Sensitivity of leak test.
Principle of work of the present invention is:
If closed electromagnetic valve and generation leakage, then there is not liquid communication between first detecting electrode 1 and second detecting electrode 2, it is infinitely great that its impedance is tending towards, can't constitute signal path, signal acquisition circuit 4 does not have the useful signal input, thereby make envelope detection circuit output Vx level off to 0, then comparer IC1D output end vo is a high level;
If solenoid valve produces when leaking or opening, the conducting liquid circulation is then arranged between first detecting electrode 1 and second detecting electrode 2, its impedance phase is to less, form signal path, amplify by 2 samplings of second detecting electrode and by in-phase amplifier IC1C, the pulse signal of output obtains amplitude voltage Vx through after the envelope detection again, this amplitude voltage Vx compares at input end and the reference comparison voltages Vr of voltage comparator ic 1D, when amplitude voltage Vx is higher than reference comparison voltages Vr, output Vo is a low level, thereby takes out the status signal that solenoid valve is opened or leaked.If system detects output voltage V o under the condition of solenoid closure is low level, can judge that then solenoid valve leaks, thereby take the emergency disposal measure rapidly, avoid equipment and treatment harm.
Claims (2)
1. electromagnetic valve leak detection system for blood purification, comprise liquid road and testing circuit, wherein the liquid road is provided with solenoid valve and influidic pipe road, it is characterized in that: described testing circuit is provided with signal generating circuit (3), the output terminal of this signal generating circuit (3) connects first detecting electrode (1), this first detecting electrode (1) is installed in the influidic pipe road of described solenoid valve one side, second detecting electrode (2) is installed in the influidic pipe road of this solenoid valve opposite side, this second detecting electrode (2) connects the input end of signal acquisition circuit (4), the output terminal of this signal acquisition circuit (4) is connected with signal processing circuit (5), and this signal processing circuit (5) generates the signal (Vo) whether solenoid valve leaks;
Described signal generating circuit (3) is an oscillatory circuit, this oscillatory circuit is provided with operational amplifier (IC1A), the inverting input of this operational amplifier (IC1A) is connected in series first electric capacity (C1) back ground connection, the normal phase input end of this operational amplifier (IC1A) is connected in series first resistance (R3) back ground connection, be serially connected with first feedback resistance (R1) between output terminal of this operational amplifier (IC1A) and the inverting input, also be serially connected with second feedback resistance (R2) between output terminal of this operational amplifier (IC1A) and the normal phase input end, the output terminal of this operational amplifier (IC1A) is connected in series first current-limiting resistance (R10) back and links to each other with the positive pole of first zener diode (D1), the negative pole of this first zener diode (D1) connects the negative pole of second zener diode (D2), the plus earth of this second zener diode (D2), the positive pole of described first zener diode (D1) also is connected on the normal phase input end of emitter follower (IC1B), the inverting input of this emitter follower (IC1B) directly links to each other with output terminal, and the output terminal of this emitter follower (IC1B) is connected on described first detecting electrode (1);
Described signal acquisition circuit (4) is provided with an in-phase amplifier (IC1C), the normal phase input end of this in-phase amplifier (IC1C) is connected in series second current-limiting resistance (R4) back and is connected with second detecting electrode (2), inverting input string first divider resistance (R5) the back ground connection of this in-phase amplifier (IC1C), be connected with feedback resistance (R6) between inverting input of this in-phase amplifier (IC1C) and the output terminal, this output terminal is the signal output interface of described signal acquisition circuit (4);
Described signal processing circuit (5) is provided with an envelope detection circuit, this envelope detection circuit is provided with the 3rd zener diode (D3), the positive pole of the 3rd voltage stabilizing diode (D3) receives the output signal of described signal acquisition circuit (4), the negative pole of the 3rd zener diode (D3) is connected on the normal phase input end of voltage comparator (IC1D) after being connected in series second resistance (R7), normal phase input end serial connection pull down resistor (R11) the back ground connection of this voltage comparator (IC1D), the two ends of this pull down resistor (R11) also and be connected to second electric capacity (C2), the inverting input of described voltage comparator (IC1D) is connected in series second divider resistance (R8) back and is connected with positive supply, the inverting input of this voltage comparator (IC1D) also is connected in series a slide rheostat (R9) back and links to each other with ground, and the output terminal of this voltage comparator (IC1D) is exported the signal (Vo) whether described solenoid valve leaks.
2. electromagnetic valve leak detection system for blood purification according to claim 1 is characterized in that: described first detecting electrode (1) and second detecting electrode (2) are a kind of needle-like or ring-type probe.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101913232A CN101718608B (en) | 2009-11-03 | 2009-11-03 | Electromagnetic valve leak detection system for blood purification |
| PCT/CN2010/072658 WO2011054198A1 (en) | 2009-11-03 | 2010-05-12 | Leak detecting system of solenoid valve in blood purification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101913232A CN101718608B (en) | 2009-11-03 | 2009-11-03 | Electromagnetic valve leak detection system for blood purification |
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| CN101718608A CN101718608A (en) | 2010-06-02 |
| CN101718608B true CN101718608B (en) | 2011-07-20 |
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| CN2009101913232A Active CN101718608B (en) | 2009-11-03 | 2009-11-03 | Electromagnetic valve leak detection system for blood purification |
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| CN (1) | CN101718608B (en) |
| WO (1) | WO2011054198A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| UA110750C2 (en) * | 2012-05-01 | 2016-02-10 | Ктр Меньюфекчурінґ Індастріз Лімітед | A device for detecting leakage |
| CN102908686B (en) * | 2012-07-26 | 2015-02-18 | 重庆山外山科技有限公司 | Balance cavity leak detecting system for blood purification |
| CN103018780B (en) * | 2012-12-31 | 2015-11-04 | 中国科学院合肥物质科学研究院 | A kind of Probe-type high-frequency-respoliquid liquid metal leakage detector |
| CN105092180B (en) * | 2015-07-20 | 2017-10-13 | 北京云网天成科技有限公司 | A kind of leak detection sensor |
| CN106770487A (en) * | 2016-12-26 | 2017-05-31 | 现代牧业(集团)有限公司 | A kind of liquid electricity conduction testing instrument |
| CN113092036A (en) * | 2021-04-07 | 2021-07-09 | 绍兴第二医院医共体总院(绍兴第二医院) | Electromagnetic valve capable of monitoring gas leakage and working method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2092089U (en) * | 1991-03-07 | 1992-01-01 | 机械电子工业部天津工程机械研究所 | Liquid flowmeter |
| CN2253204Y (en) * | 1996-04-23 | 1997-04-30 | 张普生 | Reusing device of artificial kidney dialysate |
| US6122599A (en) * | 1998-02-13 | 2000-09-19 | Mehta; Shailesh | Apparatus and method for analyzing particles |
| JPH11241376A (en) * | 1998-02-25 | 1999-09-07 | Daiwa House Ind Co Ltd | Water leakage detection device |
| CN2627485Y (en) * | 2003-07-07 | 2004-07-21 | 兰州泰得燃烧设备工程有限公司 | Fluid medium leakage detection device |
| CN100460023C (en) * | 2006-05-24 | 2009-02-11 | 重庆山外山科技有限公司 | Ion concentration monitor for purifying blood |
-
2009
- 2009-11-03 CN CN2009101913232A patent/CN101718608B/en active Active
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2010
- 2010-05-12 WO PCT/CN2010/072658 patent/WO2011054198A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| CN101718608A (en) | 2010-06-02 |
| WO2011054198A1 (en) | 2011-05-12 |
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